CN105617817B - For the device and method of acetate acid tail gas recycling CO - Google Patents
For the device and method of acetate acid tail gas recycling CO Download PDFInfo
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- CN105617817B CN105617817B CN201610130861.0A CN201610130861A CN105617817B CN 105617817 B CN105617817 B CN 105617817B CN 201610130861 A CN201610130861 A CN 201610130861A CN 105617817 B CN105617817 B CN 105617817B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0454—Controlling adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/4002—Production
- B01D2259/40024—Production with three sub-steps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
Abstract
A kind of device and method for acetate acid tail gas recycling CO, washing methanol go back to acetic synthesis workshop；Methanol uses washing after washing；Washing gas after washing returns to battery limit (BL), through being decompressed to 1.6MPa, by PSA 1 by CO2Removing, while the impurity compositions such as moisture in gas are removed；Remove CO2Decarbonization gas go to 2 workshop sections of PSA, using pressure swing adsorption technique purify CO；Because the displacement exhaust gas discharged of PSA 2 contains more CO, using the CO in PSA 3 further purification recycling displacement exhaust gas.Products C O boosts to 3.3MPa through compressor, and acetic synthesis workshop is sent to do raw material.The absorption exhaust gas and displacement exhaust gas after absorption exhaust gas and the purifications of PSA 3 CO after the purifications of PSA 2 CO.Avoid the defects of a large amount of CO emptying of the prior art had not only wasted the energy, and increased production of acetic acid cost but also polluted environment.
Description
Technical field
The invention belongs to tail gas recycle technical fields, and in particular to a kind of device and side for acetate acid tail gas recycling CO
Method.
Background technology
The tail gas generated during production of acetic acid, it is most at present all to make at emptying due to the limitation of separation and recovery technology
Reason.Containing a large amount of CO in acetate acid tail gas, it is slightly changed according to the difference of each condition of production, relatively common composition is for example right
A set of acetic acid plant for producing 100000 t of acetic acid per year, tail gas CO tolerance is about 1500~2000Nm3/h.CO is the basic of production of acetic acid
Raw material, a large amount of CO emptying, both wastes the energy, increases production of acetic acid cost, and polluted environment.Each production of acetic acid producer
There is an urgent need to find a kind of technique of recovery of acetic acid tail gas being simple and efficient.
Invention content
It is an object of the invention to provide a kind of device and method for acetate acid tail gas recycling CO, avoid of the prior art
The defects of a large amount of CO emptying had not only wasted the energy, and had increased production of acetic acid cost but also polluted environment.
A kind of device and side for acetate acid tail gas recycling CO in order to overcome the deficiencies in the prior art, the present invention provides
The solution of method, it is specific as follows：
A kind of device for acetate acid tail gas recycling CO, the device washed for methanol including interconnection, for PSA-1
The device of workshop section, the device for PSA-2 workshop sections and the device for PSA-3 workshop sections, wherein the device for PSA-2 workshop sections leads to
The pipeline with the 5th regulating valve is crossed with PSA-3 workshop sections to be connected, for PSA-2 workshop sections device by carrying the 5th regulating valve
Pipeline be connected with the junction that PSA-3 workshop sections are connected by pipeline with regeneration Gas Cooler, and regenerate Gas Cooler and lead to
Piping is connected with for the device of PSA-1 workshop sections；
Wherein include the first blending tank and Methanol Wash Column for the device that methanol is washed, first blending tank and methanol are washed
It washs and is connected by pipeline between tower, is connected between the Methanol Wash Column and separator by pipeline；
The device for PSA-1 workshop sections includes separator, the first regulating valve, the adsorption tower of PSA-1 workshop sections, purified gas
Surge tank, the 4th regulating valve and purification hot-air heater, the separator is by carrying the pipeline of the first regulating valve with PSA-1 workshop sections
Adsorption tower be connected, the adsorption tower of the PSA-1 workshop sections is connected by pipeline with purified gas surge tank, and the purified gas is delayed
It rushes tank and is connected by carrying the pipeline of the 4th regulating valve with purification hot-air heater, the purification hot-air heater is same by pipeline
The adsorption tower of PSA-2 workshop sections is connected；
The device for PSA-2 workshop sections includes the adsorption tower of PSA-2 workshop sections, and the adsorption tower of the PSA-2 workshop sections leads to
Piping is connected with for the devices of PSA-1 workshop sections, and the adsorption towers of the PSA-2 workshop sections is by carrying the pipe of the first sequencing valve
Road is connected with downflow releasing tank, and the downflow releasing tank is connected by carrying the pipeline of the second sequencing valve with putting useless tank, described to put useless tank
It is connected by the pipeline for carrying the second regulating valve with downflow releasing tank, it is described to put useless tank by carrying the pipeline of the second regulating valve with suitable
The engaging portion that tank is connected is put by pipeline with for the device of PSA-3 workshop sections to be connected, it is described to put useless tank by carrying third
The pipeline of sequencing valve is connected with CO surge tanks, and the CO surge tanks are by carrying the pipeline of the second regulating valve and with third tune
The pipeline of section valve is connected with pipeline；It is connected, and first with cooler before the first pump further with the pipeline of the second sequencing valve
Cooler is connected with the first vacuum pump before pump, and first vacuum pump is connected with pipeline；The second mixing of the mixing CO
Tank is also connected with for the device of PSA-2 workshop sections with the device for PSA-3 workshop sections, and second blending tank also passes through pipeline
It is connected with cooler before compression, cooler passes through the same air blower of pipeline, the first cooler, flowmeter and oil expeller shape before the compression
Into an access, cooler is also connected by carrying the pipeline of the 4th regulating valve with compressor before compression；The oil expeller is also same
It is connected for the device and the device for PSA-3 workshop sections of PSA-2 workshop sections；
It is described that put useless tank same by pipeline with the engaging portion that downflow releasing tank is connected by the pipeline for carrying the second regulating valve
The adsorption tower of PSA-3 workshop sections is connected, and the adsorption tower of the PSA-3 workshop sections is by carrying the pipeline of the 5th regulating valve with pipeline phase
Connection；It is connected further with the pipeline of the second sequencing valve with cooler before the second pump, cooler passes through pipe before second pump
Road is connected with the second vacuum pump, and second vacuum pump is connected by pipeline with pipeline.
Method for the device of acetate acid tail gas recycling CO is to remove acetic acid and iodine micro in unstripped gas by methanol
Methane, washing methanol go back to acetic synthesis workshop；Methanol is completed after washing using washing, washing using existing water wash system；Washing
Rear washing gas returns to battery limit (BL), through being decompressed to 1.6MPa, by PSA-1 workshop sections by CO2Removing, at the same moisture in gas etc. is miscellaneous
Matter component removes；Remove CO2Decarbonization gas go to PSA-2 workshop sections, CO is purified using pressure swing adsorption technique, obtaining meeting CO mass will
The product asked；Because the displacement exhaust gas of PSA-2 workshop sections discharge contains more CO, further purifying recycling using PSA-3 workshop sections puts
The CO in exhaust gas is changed, improves the yield of CO；Products C O boosts to 3.3MPa through compressor, and acetic synthesis workshop is sent to do raw material；
The absorption exhaust gas and displacement exhaust gas after absorption exhaust gas and PSA-3 workshop sections purification CO after PSA-2 workshop sections purification CO, for PSA-1
The regeneration of workshop section, the gas after regeneration, i.e. stripping gas send out battery limit (BL) for users to use.
The present invention goes back to acetic synthesis workshop by washing methanol；Methanol uses washing after washing；Washing gas after washing returns
Battery limit (BL), through being decompressed to 1.6MPa, by PSA-1 by CO2Removing, while the impurity compositions such as moisture in gas are removed；Remove CO2
Decarbonization gas go to PSA-2 workshop sections, using pressure swing adsorption technique purify CO；Because the displacement exhaust gas of PSA-2 discharges contains more CO,
The CO in recycling displacement exhaust gas is further purified using PSA-3.Products C O boosts to 3.3MPa through compressor, send acetic synthesis vehicle
Between do raw material.The absorption exhaust gas and displacement exhaust gas after absorption exhaust gas and PSA-3 purifications CO after PSA-2 purifications CO.It avoids existing
There is the defects of emptying of a large amount of CO in technology had not only wasted the energy, and increased production of acetic acid cost but also polluted environment.It realizes
The effect of recovery of acetic acid tail gas that is simple and efficient.
Description of the drawings
Fig. 1 is the structure diagram of device washed for methanol.
Fig. 2 is the structure diagram of the device for PSA-1 workshop sections of the present invention.
Fig. 3 is the part-structure schematic diagram of the device for PSA-2 workshop sections of the present invention.
Fig. 4 is another part structure diagram of the device for PSA-2 workshop sections of the present invention.
Fig. 5 is the structure diagram of the device for PSA-3 workshop sections of the present invention.
Fig. 6 is the flow chart of the method for the device that CO is recycled for acetate acid tail gas of the present invention.
Specific embodiment
Invention content is described further with reference to the accompanying drawings and examples：
With reference to shown in Fig. 1-Fig. 6, for the device of acetate acid tail gas recycling CO, the dress washed for methanol including interconnection
It puts, the device for PSA-1 workshop sections, the device for PSA-2 workshop sections and the device for PSA-3 workshop sections, wherein for PSA-2
The device of workshop section is connected by carrying the pipeline of the 5th regulating valve with PSA-3 workshop sections, and the device for PSA-2 workshop sections passes through band
The pipeline for having the 5th regulating valve is connected with the junction that PSA-3 workshop sections are connected by pipeline with regeneration Gas Cooler, and again
Angry cooler is connected by pipeline with for the device of PSA-1 workshop sections；
Wherein include the first blending tank and Methanol Wash Column for the device that methanol is washed, first blending tank and methanol are washed
It washs and is connected by pipeline between tower, is connected between the Methanol Wash Column and separator by pipeline；
The device for PSA-1 workshop sections includes separator, the first regulating valve, the adsorption tower of PSA-1 workshop sections, purified gas
Surge tank, the 4th regulating valve and purification hot-air heater, the separator is by carrying the pipeline of the first regulating valve with PSA-1 workshop sections
Adsorption tower be connected, the adsorption tower of the PSA-1 workshop sections is connected by pipeline with purified gas surge tank, and the purified gas is delayed
It rushes tank and is connected by carrying the pipeline of the 4th regulating valve with purification hot-air heater, the purification hot-air heater is same by pipeline
The adsorption tower of PSA-2 workshop sections is connected；
The device for PSA-2 workshop sections includes the adsorption tower of PSA-2 workshop sections, and the adsorption tower of the PSA-2 workshop sections leads to
Piping is connected with for the devices of PSA-1 workshop sections, and the adsorption towers of the PSA-2 workshop sections is by carrying the pipe of the first sequencing valve
Road is connected with downflow releasing tank, and the downflow releasing tank is connected by carrying the pipeline of the second sequencing valve with putting useless tank, described to put useless tank
It is connected by the pipeline for carrying the second regulating valve with downflow releasing tank, it is described to put useless tank by carrying the pipeline of the second regulating valve with suitable
The engaging portion that tank is connected is put by pipeline with for the device of PSA-3 workshop sections to be connected, it is described to put useless tank by carrying third
The pipeline of sequencing valve is connected with CO surge tanks, and the CO surge tanks are by carrying the pipeline of the second regulating valve and with third tune
The pipeline of section valve is connected with pipeline；It is connected, and first with cooler before the first pump further with the pipeline of the second sequencing valve
Cooler is connected with the first vacuum pump before pump, and first vacuum pump is connected with pipeline；The second mixing of the mixing CO
Tank is also connected with for the device of PSA-2 workshop sections with the device for PSA-3 workshop sections, and second blending tank also passes through pipeline
It is connected with cooler before compression, cooler passes through the same air blower of pipeline, the first cooler, flowmeter and oil expeller shape before the compression
Into an access, cooler is also connected by carrying the pipeline of the 4th regulating valve with compressor before compression；The oil expeller is also same
It is connected for the device and the device for PSA-3 workshop sections of PSA-2 workshop sections；
It is described that put useless tank same by pipeline with the engaging portion that downflow releasing tank is connected by the pipeline for carrying the second regulating valve
The adsorption tower of PSA-3 workshop sections is connected, and the adsorption tower of the PSA-3 workshop sections is by carrying the pipeline of the 5th regulating valve with pipeline phase
Connection；It is connected further with the pipeline of the second sequencing valve with cooler before the second pump, cooler passes through pipe before second pump
Road is connected with the second vacuum pump, and second vacuum pump is connected by pipeline with pipeline.
Method for the device of acetate acid tail gas recycling CO is to remove acetic acid and iodine micro in unstripped gas by methanol
Methane, washing methanol go back to acetic synthesis workshop；Methanol is completed after washing using washing, washing using existing water wash system；Washing
Rear washing gas returns to battery limit (BL), through being decompressed to 1.6MPa, by PSA-1 workshop sections by CO2Removing, at the same moisture in gas etc. is miscellaneous
Matter component removes；Remove CO2Decarbonization gas go to PSA-2 workshop sections, CO is purified using pressure swing adsorption technique, obtaining meeting CO mass will
The product asked；Because the displacement exhaust gas of PSA-2 workshop sections discharge contains more CO, further purifying recycling using PSA-3 workshop sections puts
The CO in exhaust gas is changed, improves the yield of CO；Products C O boosts to 3.3MPa through compressor, and acetic synthesis workshop is sent to do raw material；
The absorption exhaust gas and displacement exhaust gas after absorption exhaust gas and PSA-3 workshop sections purification CO after PSA-2 workshop sections purification CO, for PSA-1
The regeneration of workshop section, the gas after regeneration, i.e. stripping gas send out battery limit (BL) for users to use.
The process that the methanol is washed is：
Come two strands of acetic synthesis tail gas from acetic synthesis workshop, wherein the flow of the material of one acetic acid is 1300Nm3/
H, pressure is 2.74Mpag and temperature is 37 DEG C；The flow of the material of another strand of acetic acid is 2700Nm3/ h, pressure 2.76Mpag
And temperature is 34.4 DEG C；Two strands of materials enter Methanol Wash Column after the mixing of the first blending tank, remove the micro vinegar wherein contained
Acid and iodomethane go out battery limit (BL) and are washed into existing washing workshop section, and the synthesis tail gas after washing enters PSA-1 workshop sections.
The process of the PSA-1 workshop sections is：
The acetic synthesis tail gas to come from washing workshop section initially enters separator and carries out gas-liquid separation, is then adjusted through first
After valve is depressurized to 1.6MPa, the adsorption tower into PSA-1 workshop sections carries out pressure-variable adsorption, adsorbent in the adsorption tower of PSA-1 workshop sections
To CO in gas2Selective absorption is carried out, remaining thick CO gases enter purified gas after passing through the adsorption tower bed of PSA-1 workshop sections
Surge tank, the tail gas come out from purified gas surge tank, being warming up to air pressure through the decompression of the 4th regulating valve and purification hot-air heater is
0.8Mpa and temperature are sent to PSA-2 workshop sections after being 70 DEG C, and CO is further purified as PSA-2 workshop sections unstripped gas；
After the adsorption tower adsorption saturation of the PSA-1 workshop sections, through equal pressure drop, inverse put, flushing, pressure rise, fill eventually as
Step is regenerated, and is recycled；And the absorption exhaust gas from PSA-2 workshop sections, 0.08MPa is depressurized to through the 5th regulating valve, with
Absorption exhaust gas mixing from PSA-3 workshop sections is cooled to 40 DEG C, the flushing gas as PSA-1 workshop sections through regenerating Gas Cooler.It is whole
A process passes through timing control so that outlet purified gas is continuous, stablizes.
The process of the PSA-2 workshop sections is：
The adsorption tower that the purified gas to come from PSA-1 workshop sections enters PSA-2 workshop sections carries out pressure-variable adsorption, PSA-2 workshop sections
Copper-carrying adsorbent in adsorption tower has stronger adsorption capacity to CO, CO in gas is absorbed, remaining in purified gas
Component gases are sent into PSA-1 workshop sections as regeneration gas after passing through the adsorbent of the adsorption tower of PSA-2 workshop sections；
After the adsorption tower adsorption saturation of PSA-2 workshop sections, through equal pressure drop, along put, replace, inverse put, evacuation, pressure rise, fill eventually
Such step is regenerated, and is recycled；
Enter downflow releasing tank through the first sequencing valve along deflating, displacement exhaust gas enters through the second sequencing valve puts useless tank, puts useless tank and goes out
The gas come is after the second regulating valve is depressurized to 0.08MPa, and with the gas mixing of downflow releasing tank out, gaseous mixture is sent to PSA-3 works
Section, as PSA-3 workshop sections unstripped gas；
Inverse put early period, since pressure is higher, reverse gas enters CO surge tanks by the first sequencing valve, is then adjusted through second
Valve is depressurized to 0.01MPa, is mixed into pipeline PG-09224 with other CO product gas；
Inverse put later stage, reverse gas are directly entered pipeline PG-09224 by third regulating valve and are mixed with other CO product gas；
Pump-down is taken out before air is pumped by the second sequencing valve into first after cooler cooling, into the first vacuum pump
It is evacuated, during evacuation, the reachable -0.08MPa of maximum vacuum.Enter from the gas that the first vacuum pump comes out as product gas
Pipeline PG-09224；
After the reverse gas and pumping air of PSA-2 workshop sections are mixed with the pumping air of PSA-3 workshop sections, into the second of mixing CO
Blending tank, the compressed preceding cooler of gas that the second blending tank comes out are cooled to 40 DEG C, are divided into two strands；Wherein a stock-traders' know-how air blower adds
Pressure, the cooling of the first cooler, after flowmeter metering, into oil expeller, the gas that oil expeller comes out is divided into two strands, is sent to respectively
PSA-2 workshop sections and PSA-3 workshop sections are as displacement gas；Another strand of gas after the 4th regulating valve pressure regulation, is sent to pressure as product gas
Contracting machine is forced into 3.3MPa, is sent to acetic synthesis workshop.
The process of the PSA-3 workshop sections is：
The adsorption tower that the displacement gas to come from PSA-2 workshop sections enters PSA-3 workshop sections carries out pressure-variable adsorption, PSA-3 workshop sections
Adsorbent carries out selective absorption to CO in gas in adsorption tower, and the absorption exhaust gas across the adsorption tower of PSA-3 workshop sections is sent to PSA
One section；
After the adsorption tower adsorption saturation of PSA-3 workshop sections, through equal pressure drop, along put, replace, inverse put, evacuation, pressure rise, fill eventually
Such step is regenerated, and is recycled；
Reverse gas is directly entered pipeline by the 5th regulating valve and is mixed with other CO product gas；
Pump-down is taken out air and is entered before the second pump after cooler cooling by the second sequencing valve, into the second vacuum pump,
During evacuation, the reachable -0.08MPa of maximum vacuum.The gas come out from the second vacuum pump enters pipeline as product gas.
The above described is only a preferred embodiment of the present invention, not make limitation in any form to the present invention, though
So the present invention is disclosed above with preferred embodiment, however is not limited to the present invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as be without departing from technical solution of the present invention content, technical spirit according to the present invention,
Within the spirit and principles in the present invention, any simple modification, equivalent replacement and improvement for made to above example etc., still
Belong within the protection domain of technical solution of the present invention.
Claims (5)
1. a kind of device for acetate acid tail gas recycling CO, it is characterised in that the device washed for methanol including interconnection,
Device for PSA-1 workshop sections, the device for PSA-2 workshop sections and the device for PSA-3 workshop sections, wherein for PSA-2 works
Section device be connected by carrying the pipeline of the 5th regulating valve with PSA-3 workshop sections, for PSA-2 workshop sections device by carrying
The pipeline of 5th regulating valve is connected with the junction that PSA-3 workshop sections are connected by pipeline with regeneration Gas Cooler, and is regenerated
Gas Cooler is connected by pipeline with for the device of PSA-1 workshop sections；
Wherein include the first blending tank and Methanol Wash Column, first blending tank and Methanol Wash Column for the device that methanol is washed
Between be connected by pipeline, be connected between the Methanol Wash Column and separator by pipeline；
The device for PSA-1 workshop sections includes separator, the first regulating valve, the adsorption tower of PSA-1 workshop sections, purified gas buffering
Tank, the 4th regulating valve and purification hot-air heater, the separator is by carrying suction of the pipeline with PSA-1 workshop sections of the first regulating valve
Attached tower is connected, and the adsorption tower of the PSA-1 workshop sections is connected by pipeline with purified gas surge tank, the purified gas surge tank
It is connected by the pipeline for carrying the 4th regulating valve with purification hot-air heater, the purification hot-air heater passes through the same PSA-2 of pipeline
The adsorption tower of workshop section is connected；
The device for PSA-2 workshop sections includes the adsorption tower of PSA-2 workshop sections, and the adsorption tower of the PSA-2 workshop sections passes through pipe
Road is connected with for the device of PSA-1 workshop sections, and the adsorption tower of the PSA-2 workshop sections is same by the pipeline for carrying the first sequencing valve
Downflow releasing tank is connected, and the downflow releasing tank is connected by carrying the pipeline of the second sequencing valve with putting useless tank, described to put useless tank and pass through
Pipeline with the second regulating valve is connected with downflow releasing tank, described to put useless tank and pass through the same downflow releasing tank of the pipeline for carrying the second regulating valve
The engaging portion being connected is connected by pipeline with for the devices of PSA-3 workshop sections, and described to put useless tank program-controlled by carrying third
The pipeline of valve is connected with CO surge tanks, and the CO surge tanks are by carrying the pipeline of the second regulating valve and with third regulating valve
Pipeline be connected with pipeline；It is connected further with the pipeline of the second sequencing valve with cooler before the first pump, and before the first pump
Cooler is connected with the first vacuum pump, and first vacuum pump is connected with pipeline；The second blending tank of the mixing CO is also
It is connected with for the device of PSA-2 workshop sections with the device for PSA-3 workshop sections, second blending tank is also by pipeline the same as pressure
Cooler is connected before contracting, and cooler forms one by the same air blower of pipeline, the first cooler, flowmeter and oil expeller before the compression
Access, cooler is also connected by carrying the pipeline of the 4th regulating valve with compressor before compression；The oil expeller is also same to be used for
The device of PSA-2 workshop sections is connected with the device for PSA-3 workshop sections；
It is described put useless tank by carry the pipeline of the second regulating valve with the engaging portion that downflow releasing tank is connected by pipeline with PSA-3 works
The adsorption tower of section is connected, and the adsorption tower of the PSA-3 workshop sections is connected by carrying the pipeline of the 5th regulating valve with pipeline；Separately
The pipeline with the second sequencing valve is connected with cooler before the second pump outside, and cooler passes through pipeline same second before second pump
Vacuum pump is connected, and second vacuum pump is connected by pipeline with pipeline；
It is as follows for the method for the device of acetate acid tail gas recycling CO：Remove acetic acid micro in unstripped gas and iodine first by methanol
Alkane, washing methanol go back to acetic synthesis workshop；Methanol is completed after washing using washing, washing using existing water wash system；After washing
Washing gas return to battery limit (BL), through being decompressed to 1.6MPa, by PSA-1 workshop sections by CO2Removing, while by impurity such as moisture in gas
Component removes；Remove CO2Decarbonization gas go to PSA-2 workshop sections, using pressure swing adsorption technique purify CO, obtain meeting CO quality requirements
Product；Because the displacement exhaust gas of PSA-2 workshop sections discharge contains more CO, recycling displacement is further purified using PSA-3 workshop sections
CO in exhaust gas improves the yield of CO；Products C O boosts to 3.3MPa through compressor, and acetic synthesis workshop is sent to do raw material；PSA-2
The absorption exhaust gas and displacement exhaust gas after absorption exhaust gas and PSA-3 workshop sections purification CO after workshop section purification CO, for PSA-1 workshop sections
Regeneration, the gas after regeneration, i.e. stripping gas send out battery limit (BL) for users to use.
2. the method for the device according to claim 1 for acetate acid tail gas recycling CO, it is characterized in that, the methanol is washed
Process be：
Come two strands of acetic synthesis tail gas from acetic synthesis workshop, wherein the flow of the material of one acetic acid is 1300Nm3/ h, pressure
Power is 2.74Mpag and temperature is 37 DEG C；The flow of the material of another strand of acetic acid is 2700Nm3/ h, pressure are 2.76Mpag and temperature
Spend is 34.4 DEG C；Two strands of materials enter Methanol Wash Column after the mixing of the first blending tank, remove the acetate in minute that wherein contains and
Iodomethane goes out battery limit (BL) and is washed into existing washing workshop section, and the synthesis tail gas after washing enters PSA-1 workshop sections.
3. the method for the device according to claim 1 for acetate acid tail gas recycling CO, it is characterized in that, the PSA-1
The process of workshop section is：
The acetic synthesis tail gas to come from washing workshop section initially enters separator and carries out gas-liquid separation, is then dropped through the first regulating valve
After being depressed into 1.6MPa, the adsorption tower into PSA-1 workshop sections carries out pressure-variable adsorption, and adsorbent is to gas in the adsorption tower of PSA-1 workshop sections
CO in body2Selective absorption is carried out, remaining thick CO gases enter purified gas buffering after passing through the adsorption tower bed of PSA-1 workshop sections
Tank, the tail gas come out from purified gas surge tank are depressured and are purified through the 4th regulating valve hot-air heater and is warming up to air pressure as 0.8Mpa
PSA-2 workshop sections are sent to after being 70 DEG C with temperature, CO is further purified as PSA-2 workshop sections unstripped gas；
After the adsorption tower adsorption saturation of the PSA-1 workshop sections, through equal pressure drop, inverse put, flushing, pressure rise, fill such step eventually
It is regenerated, is recycled；And the absorption exhaust gas from PSA-2 workshop sections, be depressurized to 0.08MPa through the 5th regulating valve, with from
The absorption exhaust gas mixing of PSA-3 workshop sections is cooled to 40 DEG C, the flushing gas as PSA-1 workshop sections through regenerating Gas Cooler.
4. the method for the device according to claim 1 for acetate acid tail gas recycling CO, it is characterized in that, the PSA-2 works
Section process be：
The adsorption tower that the purified gas to come from PSA-1 workshop sections enters PSA-2 workshop sections carries out pressure-variable adsorption, will be under CO absorption in gas
Come, remaining component gases in purified gas are sent into PSA-1 workshop sections as regeneration after passing through the adsorbent of the adsorption tower of PSA-2 workshop sections
Gas；
After the adsorption tower adsorption saturation of PSA-2 workshop sections, through equal pressure drop, along put, replace, inverse put, evacuation, pressure rise, fill eventually in this way
The step of regenerated, recycle；
Enter downflow releasing tank through the first sequencing valve along deflating, displacement exhaust gas enters through the second sequencing valve puts useless tank, puts what useless tank came out
Gas is after the second regulating valve is depressurized to 0.08MPa, and with the gas mixing of downflow releasing tank out, gaseous mixture is sent to PSA-3 workshop sections, makees
For PSA-3 workshop sections unstripped gas；
Inverse put early period, reverse gas enter CO surge tanks by the first sequencing valve, are then depressurized to 0.01MPa through the second regulating valve,
It is mixed into pipeline with other CO product gas；
Inverse put later stage, reverse gas are directly entered pipeline by third regulating valve and are mixed with other CO product gas；
Pump-down is taken out before air is pumped by the second sequencing valve into first after cooler cooling, into the progress of the first vacuum pump
It evacuates, the gas come out from the first vacuum pump enters pipeline as product gas；
After the reverse gas and pumping air of PSA-2 workshop sections are mixed with the pumping air of PSA-3 workshop sections, into the second mixing of mixing CO
Tank, the compressed preceding cooler of gas that the second blending tank comes out are cooled to 40 DEG C, are divided into two strands；A wherein stock-traders' know-how air blower pressurizes,
First cooler cools down, and after flowmeter metering, into oil expeller, the gas that oil expeller comes out is divided into two strands, is sent to PSA-2 respectively
Workshop section and PSA-3 workshop sections are as displacement gas；Another strand of gas after the 4th regulating valve pressure regulation, is sent to compressor as product gas
3.3MPa is forced into, is sent to acetic synthesis workshop.
5. the method for the device according to claim 1 for acetate acid tail gas recycling CO, it is characterized in that, the PSA-3 works
Section process be：
The adsorption tower that the displacement gas to come from PSA-2 workshop sections enters PSA-3 workshop sections carries out pressure-variable adsorption, the absorption of PSA-3 workshop sections
Adsorbent carries out selective absorption to CO in gas in tower, and the absorption exhaust gas across the adsorption tower of PSA-3 workshop sections is sent to PSA mono-
Section；
After the adsorption tower adsorption saturation of PSA-3 workshop sections, through equal pressure drop, along put, replace, inverse put, evacuation, pressure rise, fill eventually in this way
The step of regenerated, recycle；
Reverse gas is directly entered pipeline by the 5th regulating valve and is mixed with other CO product gas；
Pump-down is taken out air and is entered before the second pump after cooler cooling by the second sequencing valve, into the second vacuum pump, from the
The gas that two vacuum pumps come out enters pipeline as product gas.
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| CN106145112A (en) * | 2016-07-01 | 2016-11-23 | 茂县鑫新能源有限公司 | A kind of new technology utilizing temperature control conversion to prepare high-purity CO and system |
| CN108339368A (en) * | 2018-03-14 | 2018-07-31 | 镇江东辰环保科技工贸有限公司 | Two sections of adsorbent equipments of production of acetic acid tail gas and processing method |
| CN114646018A (en) * | 2022-01-24 | 2022-06-21 | 天津渤化永利化工股份有限公司 | High-pressure tail gas recovery method for acetic acid device |
| CN114405228B (en) * | 2022-02-17 | 2023-04-11 | 四川天人能源科技有限公司 | Improved process for purifying carbon monoxide by pressure swing adsorption |
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| CN204429052U (en) * | 2014-12-05 | 2015-07-01 | 成都巨涛油气工程有限公司 | A kind of acetate acid tail gas purifying carbon oxide device |
| CN205392104U (en) * | 2016-03-08 | 2016-07-27 | 镇江东辰环保科技工贸有限公司 | CO's device is retrieved to acetic acid tail gas |
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| CN204429052U (en) * | 2014-12-05 | 2015-07-01 | 成都巨涛油气工程有限公司 | A kind of acetate acid tail gas purifying carbon oxide device |
| CN205392104U (en) * | 2016-03-08 | 2016-07-27 | 镇江东辰环保科技工贸有限公司 | CO's device is retrieved to acetic acid tail gas |
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Effective date of registration: 20200108 Address after: 212000 room 106, C1 District, longyinfang commercial street, Jingkou District, Zhenjiang City, Jiangsu Province Co-patentee after: Jiangsu Sopo Chemical Co.,Ltd. Patentee after: ZHENJIANG DONGCHEN ENVIRONMENTAL PROTECTION TECHNOLOGY INDUSTRY AND TRADE CO., LTD. Address before: 212000 Zhenjiang City, Jiangsu province Jingkou District No. 20 South Gate Street Co-patentee before: Jiangsu Soap (Group) Co., Ltd. Patentee before: ZHENJIANG DONGCHEN ENVIRONMENTAL PROTECTION TECHNOLOGY INDUSTRY AND TRADE CO., LTD. |